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dpbird90

Original Poster:

5,307 posts

78 months

[news] 
Tuesday 15th March 2011 quote quote all
just on the way home, saw a marked police car pulled someone over, but instead of blue lights the ones on the roof were flashing red. is there any difference between this and one with blue lights on top? sorry for any bad punctuation, i am typing this on my crappy motorola!

Haytch

167 posts

48 months

[news] 
Tuesday 15th March 2011 quote quote all
The other day I saw a police car stopped with flashing reds instead of blues too, not sure why the need to switch them to blue though...

EDLT

14,730 posts

94 months

[news] 
Tuesday 15th March 2011 quote quote all
Its more eye-catching I guess. It might stop mongs from standing on the brakes whenever they see blue lights.

Shmee

6,051 posts

101 months

[news] 
Wednesday 16th March 2011 quote quote all
Red from behind when stopped, blue from in front.

Cock Womble 7

29,908 posts

118 months

[news] 
Wednesday 16th March 2011 quote quote all
Shmee said:
Red from behind when stopped
I often see police cars sat (alone) on the hard shoulder or slip road with the rear red lights flashing and wondered what (if anything) this "means".

Is it just a simple "I am here" - are the red lights just additional to the hazards, or are we supposed to act on this display somehow?

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MGZRod

6,455 posts

64 months

[news] 
Wednesday 16th March 2011 quote quote all
I see this quite a lot. I assume it's to tell which direction the car is facing, so you can prepare to maneuvre (or not if you see red!)

I.e If you see blue & red lights when you glance at mirror, no need to move to side of road.
Or if you see it ahead parked up, you may need to move over to avoid it (pulled someone over etc)

parapaul

2,828 posts

86 months

[news] 
Wednesday 16th March 2011 quote quote all
It's something along these lines:

Blue flashing lights are very eye catching, and it's an inbuilt reaction for most drivers to either have a look, slow down, or do something else that would otherwise distract them from the rest of their drive.

When plod are stopped, particularly on the hard shoulder, they use the flashing rear reds as a warning to approaching traffic of the hazard they are creating or dealing with, without offering any more distraction than necessary to oncoming traffic.

Funk

15,487 posts

97 months

[news] 
Wednesday 16th March 2011 quote quote all
Red is also at the long end of the light spectrum and therefore more easily seen at a distance by the human eye. This is why traffic lights are red for stop, as well as brake lights and tail lights. smile

Baryonyx

10,507 posts

47 months

[news] 
Wednesday 16th March 2011 quote quote all
Yes, rear reds are used when stopped facing in the same direction as the movement of traffic on the carriageway, for instance if you pull someone over for using their phone etc etc. That said, cars parked across roads for traffic management (at a crash, for instance) will use their blues still. The rear reds are just a very noticeable hazard light.

There is usually a separate control on the panel for "rear reds" and a "runlock" control for when you're going to need blue lights on a stationary vehicle.

Gwagon111

4,422 posts

49 months

[news] 
Wednesday 16th March 2011 quote quote all
Funk said:
Red is also at the long end of the light spectrum and therefore more easily seen at a distance by the human eye. This is why traffic lights are red for stop, as well as brake lights and tail lights. smile
yes Yellow is the colour that human eyes are most sensitive to.

Vipers

19,879 posts

116 months

[news] 
Wednesday 16th March 2011 quote quote all
I seem to recall seeing this in London a couple of years ago, asked a couple of lovely lady bobbies, they told me they were the armed brigade?

Mind you, could only be within London itself, or things have changed.




smile

deveng

3,621 posts

68 months

[news] 
Wednesday 16th March 2011 quote quote all
Before reading the OP I wanted to be a smart arse and say "it's braking" based on the title.

insanojackson

3,609 posts

132 months

[news] 
Wednesday 16th March 2011 quote quote all
its simply an additional warning to stop inatentive drivers from rear ending you whilst stopped.
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